20310120644004 has 36 divisors (see below), whose sum is σ = 51339648756396. Its totient is φ = 6770016857088.

The previous prime is 20310120643999. The next prime is 20310120644017. The reversal of 20310120644004 is 40044602101302.

It is a happy number.

20310120644004 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 0 + 12 + 0 + 644 + 0 + 0 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18519234346404 + 1790886297600 = 4303398^2 + 1338240^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11960652 + ... + 13552764.

Almost surely, 2^{20310120644004} is an apocalyptic number.

It is an amenable number.

20310120644004 is an abundant number, since it is smaller than the sum of its proper divisors (31029528112392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20310120644004 is a wasteful number, since it uses less digits than its factorization.

20310120644004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946476 (or 1946471 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 20310120644004 its reverse (40044602101302), we get a palindrome (60354722745306).

The spelling of 20310120644004 in words is "twenty trillion, three hundred ten billion, one hundred twenty million, six hundred forty-four thousand, four".